120120011111 has 4 divisors (see below), whose sum is σ = 120160554072. Its totient is φ = 120079468152.

The previous prime is 120120011041. The next prime is 120120011149. The reversal of 120120011111 is 111110021021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111110021021 = 106649 ⋅1041829.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120120011111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120120011092 and 120120011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120120011161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20267036 + ... + 20272961.

It is an arithmetic number, because the mean of its divisors is an integer number (30040138518).

Almost surely, 2^120120011111 is an apocalyptic number.

120120011111 is a deficient number, since it is larger than the sum of its proper divisors (40542961).

120120011111 is an equidigital number, since it uses as much as digits as its factorization.

120120011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40542960.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 120120011111 its reverse (111110021021), we get a palindrome (231230032132).

The spelling of 120120011111 in words is "one hundred twenty billion, one hundred twenty million, eleven thousand, one hundred eleven".